bikerflapper again-- first code was P0351--ignition coil bad-- I searched it out and found that was refering to cyl.#1. Since the intake had to come off to replace that one,I replaced all 3 on that side while it was torn apart. Lit it back off and now the same symtoms reappeared and I get a P0316, P0306, P0351' P0354. I am beginning to think the PCM is wacko. bikerflapper again-- first code was P0351--ignition coil bad-- I searched it out and found that was refering to cyl.#1. Since the intake had to come off to replace that one,I replaced all 3 on that side while it was torn apart. Lit it back off and now the same symtoms reappeared and I get a P0316, P0306, P0351' P0354. I am beginning to think the PCM is wacko.

bikerflapper again-- I also replaced all plugs at the same time-- car has 90000 miles. checked for vacumn leaks-- none found, intake sealed good. I am thinking the PCM may be bad although the dealer replaced it 4 months ago with the same symptoms. Thanks for the helpbikerflapper again-- I also replaced all plugs at the same time-- car has 90000 miles. checked for vacumn leaks-- none found, intake sealed good. I am thinking the PCM may be bad although the dealer replaced it 4 months ago with the same symptoms. Thanks for the help

i have a 2003 LS and it shifts seemingly on its own most of the time. the only time it runs right is when i'm doing over 70 mph but getting up to 70 is sometimes a task. i feel lots of hesitance and then this horrible smell....i'm thinking its the ignition coil. does anyone know about how much that normally costs to get fixed? i have a 2003 LS and it shifts seemingly on its own most of the time. the only time it runs right is when i'm doing over 70 mph but getting up to 70 is sometimes a task. i feel lots of hesitance and then this horrible smell....i'm thinking its the ignition coil. does anyone know about how much that normally costs to get fixed?

3 Answers

I went thru this on my 2002 LS as well.
I replaced one ignition coil at the dealer - only to get the same misfire code on another cylinder. After a little research found out is actuall a gasket/o-ring problem design of the block. Spark plugs are deep in the block - under the oil - which is why they are supposed to last 100,000 miles. But the o-rings start to leak some where between 65k-85k miles. Coils go bad because of oil contamination. If you don't solve leaking oil problem will have to replace coils again - but sooner - because leaking oil will be progressively worse.
Cost - 8 ignition coils
set of spark plugs (who knew they were that expensive
and a ton of cash for the labor to tear down the top of the motor

Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.

Lincoln LS's are good for the ignition coils going bad. This mimics a transmission issue trying to accelerate going uphill. Take your car to a LINCOLN dealer and have them do a stress test on the coil pack. It will tell them which one is bad. Also if your car is a 3.9 V8 and was built in the Wixom plant (you can tell by the VIN) google it. All of your coil packs and gaskets are covered for 10 yrs or 100,000 miles whichever comes first. It is listed in the TSB's

I had the same problem with a 2004 LS. I took it to the dealer and turned out that 6 ignition coils were out and was factory defect. Ford extended the warranty for the ignition coil. All work and parts "no charge" this service was done about a month ago